Measurement of gamma quantum interaction point in plastic scintillator with WLS strips

• DOI: 10.1016/j.nima.2017.01.045
• Publication Date: 2017-01-24T03:48:13Z
• Authors: J. Smyrski; D. Alfs; T. Bednarski; P. Białas; E. Czerwiński; K. Dulski; A. Gajos; B. Głowacz; N. Gupta-Sharma; M. Gorgol; B. Jasińska; M. Kajetanowicz; D. Kamińska; G. Korcyl; P. Kowalski; W. Krzemień; N. Krawczyk; E. Kubicz; M. Mohammed; Sz. Niedźwiecki; M. Pawlik-Niedźwi...; L. Raczyński; Z. Rudy; P. Salabura; M. Silarski; A. Strzelecki; A. Wieczorek; W. Wiślicki; J. Wojnarska; B. Zgardzińska; M. Zieliński; P. Moskal
• Keywords: STRIPS; Bar (unit); Annihilation

We demonstrated the feasibility of measuring the axial coordinate of a gamma quantum interaction point in a plastic scintillator bar via the detection of scintillation photons escaping from the scintillator with an array of wavelength-shifting (WLS) strips. Using a test set-up comprising a BC-420 scintillator bar and an~array of sixteen BC-482A WLS strips we achieved a spatial resolution of~5\,mm~($��$) for annihilation photons from a $^{22}$Na isotope. The studied method can be used to improve the spatial resolution of a plastic-scintillator-based PET scanner which is being developed by the J-PET collaboration.<br/>13 pages, 8 figures; Submitted to Nuclear Instruments and Methods in Physics Research Section A<br/>